Nova1974 | TV Show
PBS's premier science-documentary series, which has won six Peabody Awards and more than 20 Emmys (four in 2002 alone) since its 1974 debut. `Nova' clearly, and often engagingly, `demystifies' a vast range of science, technology and history topics---past a (more…)
Premiered: March 3, 1974
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Sinkholes are examined. The collapses can be gradual or sudden; and occur when carbon dioxide in the air dissolves in rainwater and forms an acid that weakens limestone and other water-soluble rocks beneath the soil. Included: video of dramatic collapses.
An examination of vaccines and why they're important. In addition to explaining how vaccines work, the report discusses the concerns and misinformation that surround them; and details the risks to both children and society if people forgo immunization, whi (more…)
Archaeologists and engineers employ ancient Roman techniques to build a 25-foot lifting machine and trap-door system similar to those used in the Colosseum, where ancient texts claim wild animals emerged, as if by magic, from beneath the floor to attack gl (more…)
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